Here's a challenge for you.
Let's say you have a parent issue with X amount of sub-tasks. The order of the sub-tasks may vary.
When sub-task 1 is completed, you want to transition sub-task 2 to "ready".
Please note that, if you change the order of sub-tasks manually, the following conditional logic does not represent the order in which you have them configured.
{{#issue.subtasks{{index}}. {{key}}{{^last}},{{/}}{{/}}I'd like to avoid creating custom fields for this. Using labels is fine, so mention in sub-task 1 via a label that sub-task 2 is next, etc.